M3 M4 M5 M6 M8 M10 M12 Shakeproof Washers Internal Serrated Lock Washer.

Feature:
- 7 size of M3 M4 M5 M6 M8 M10 M12 total 270pcs, applicable to different sizes of fasteners, can meet your different needs in daily life.
- High Quality: Made of high quality 304 stainless steel, corrosion resistant ,strong and durable.
- Sawtooth Design: The unique sawtooth design of the locking washers can make the washer tighter and not easy to slide. Exerts a spring force between the fasteners head and the substrate, creating more friction and rotation resistance.
Widely Used: Lock Washers are widely used in machinery equipment, shock absorber industrial production, bearings, machinery etc.

Packing list:
M3*50pcs, M4*50pcs, M5*50pcs, M6*40pcs, M8*40pcs, M10*20pcs, M12*20